Improved glass-board and apparatus for cutting glass



vto the exact size required.

tblitd ,that

Massaal-we FRANKLIN BOWLY, or wlNcIIEsT-ER, VIRGINIA.

Leners Patent No. 87,626, ma Mwah 9, 1869.

j IMPRovrzn GLASS-BOARD ANn APPARATUS F'oR CUTTING GLASS.

HG-. TheSchednle referred to in these Letters Patent and making part of the same.

To all whomfit mayconcernr- `Be it' known that LFBANKLIN BowLY, of Win- Achester, in the county of Frederick, and State vof Virginia, have invented a new and improved Glass-Board, or Apparatus'for Cutting Glass; and I do hereby declare that theV following is a full, clear,and exact description thereof, which will enable others skilled in vthe art toV make and use the same; reference being had to the accompanying drawings, forming part of this specification, which drawings represent a plan view of my invention.

The object of thisV invention is to provide a simple and convenient apparatus for cutting panes of glass Y It is designed more particularly for glaziers use, and for drug-stores in the country, and other places where glassis retailed, and cut to the `proper size to suit the requirements of the buyer. lt consists, in general terms, of a ruled board, having a row of pins arranged along each lateral margin,

lany two of which are Iemployed to hold a movable restgauge, against the `edges of which latter, one edge of the pane of glass is placed, while the opposite edge is being trimmed or cut. v

The pins are separated by inch spaces, and a stationary rule or straight-edge is used to guide` the diamond. 1

.Other devices perfect the whole apparatus, andrender it exceedingly convenient, vas will be hereinafter more fully set forth after a detail description of -theinvention and its operation.

In the drawingsl A is' a flat, or plane body, preferably of woodor metah having two lateral rows of pins, arranged one inch apart, and numbered, respectively, from 1 to 24, as shown, or other desired number.

Bis the rest, and is provided with a plate, a, at each end, and iny each of which plates is formeda series of small holes, arranged obliquely across the width y of the rest.

These rows. of holes are parallel, and the holes of one series or row correspondto the holes of the other row each to each, in 4such a manner or co-relation, tha when any two opposite pins of the board are inserted in any two holes in the rest, immediately opposite each other, the rest will be held at a certain prearranged distance from the ldiamond-line, or line over which the diamond is carried, by the permanent straight-edge, before mentioned.' I i The holes in the rest may be of any convenient number, as from one to eight, thus enabling the rest to be advanced or receded from the diamond-lineby eighths of an inch, or other' fraction of 'an inch.

, It will be seen that the arrangement of the holes in the rest, will enable the latter to be moved to or from`v the diamond-line by-regular intervals, by simply setting thc iirst two elongated holes of the rest on any corresponding two of the marginal pins'.

pane of glass fteen and four-eighths inches in length or width. The rest B is moved to the marginal pins ,marked 15, and set on them, with the said pins inserted `in the fourth holes of the rest, as shown. The pane of glass is now laid on the board, with one edge in'contact with the upper edge of the rest`B, as

l shown. A straightedge, C, exactly one inch wide, is

laid across the glass, (which latter is represented by red jvv color,) the lower edge of said straight-edge being rested against two studs, or pegs, b b, located in aline paralle] with the line of the pins l-1, of the board, and

exactly one inch from the said line 1-1. The front v edge ofthe straight-edge (l, now serves as a guide for the diamond, in the ordinary manner, and the pane, when so cut, will be found to be just fifteen and foureighths inches in length, for the staightedge C, being one inch wide, adds one inch to the measurement from the pins marked 14. From the lines of these pins to the 'front edge of the rest B, is one-eighth of an inch, then ythe holes 7, 6, 5, add three-eighths more, making in all fteenand four-eighths inches, as aforesaid.

It will be vobserved that the diamond-line d is a short distance from the front edge of therstraighty edge G.

This .line indicates the exact location of the trace or mark cut by the diamond, for the matrix or holder ofthe diamond will not permit the line on the glass to be cut exactly coincident with the front edge of the 'straight-edge O, and therefore, in locating the holes. e, l, 2, 3, 4, Sto., in the rest B, allowance must be made for this unavoidable distance.

To illustrate this more clearly, Iwill note that when glass is to be cut 'to any whole number of inches, as

ten inches, the elongated holes e e, of the restB, areA placed on the pins 10-10, and the front edge of the rest will then be found to lie over the line 10-10, by a distance equal to the distance of the diamond-line d from the front'edge of the straight-'edge O.

This same relation is true for each of the holes 1-1, 2 2, 3 3, Src., of the rest, so that the -proper allowance obtains inv eachy and every case, and the exact distance is thereby insured.

This condition will be perhaps more obvious when the holes e e are `placed over the pins 11 ofthe board.

y,'Ihe front edge of therest B will then lie beyo d the line b b of the board, and 'prevent the straight edge O from touching the pegs b-b. l

The lower edge of the said straig-ght--edge will then rest on the front edge of the rest, and the front'edge of the straight-edge will now be found to coincide exactly with the diamond-line d.

The rest is provided with a sliding gauge-plate, D, having parallel oblique slots f j, which enclose studs on the rest, and enable the plate to be moved parallel to itself.

It is also provided' with a clamp-screw, g, passing through a similar oblique slot, h, in the plate:` the said screw screwing into the rest.

This device is intended to be set to any irregular or intermediate size, and is particularly useful in setting, to a sample, glass of any odd size, such asis frequently used by photographers.

It is used thus: The upper edge of the sample glass is placed on? the diamond-line (I, and the rest B set to -within an eighth or two of the lower edge Vof the said sample. The sliding plate is then moved up to contact with the lower edge of the sample, and clamped. The succeeding glasses are then set with their lower edges on the plate D, and the upperedges cut over the diamond-line, as first described.

The board is crossed in both directions bylines at right angles,` and one inch apart, which are numbered consecutively, as shown.

This feature is useful in determining easily and accurately what rectangular dimensions can be obtained from any piece of glass if irregularly shaped, (though having onestraight edge,) in order to utilize such fragments, by squaring them 'or cutting to useful sizes.

- The straight edge of such fragments is placed.l on the rest. The operator can then ascertain, by inspection, what rectangular dimensions can be obtained from the fragment, and cut it accordingly.

From the foregoing it will be observed that a very advantageous feature of my invention obtains, in the fact that the diamond is always used at the same place, while the rest is movable.

This permits the employment of rm resting-pegs b b, for the, straight-edge C, thus dispensing with the close attention usually required to place the straightedge properly, every time a pane is being cut, and to hold it in the proper position while making the cut.

The facility with which the number of inches, and fractions thereof, is set oli" on'the board, is another -simportant advantage which m`y inventionv possesses,

to slip on the pins, may be employed, instead of rows of holes; but in all these modifications, the principle .of adjusting the rest B, by moving it to the right or left on the pins, and thereby changing its distance from the diamond-line d, is employed.

The front part of the sliding plate D is bent down. against the front edge of the rest B, a shallow recess-being cut out of the said front edge, to allow the bent part of the plate to be flush with the edge ofthe rest, where the said plate is not used.

Having thus described my invention,

I claim as new, and desire to secure by Letter Patentl. A'glass-board, A, having marginal pins on each side, and pegs b b, or rather equivalent rests, for the straighted'ge or diamond-rule` C, in combination with a -movable rest, B, fitting onor between the pins in the board, to enable the panes of glass to be cut in a rapid and convenient manner, substantially as described.

` 2. The two parallel and oblique 'rows of the holes l, 2, 3, 4, &c., in the ends of the movable rest B, substantially as described,v for the purpose of adjusting the said restB, of the glass-board A, to fractions of one inch, all as set forth.

3. The sliding plate D, substantially as described, in combination with the rest B and glass-board A, all as andvfor the purpose set forth.

4. vrIlhe glass-board A, having movablerest B and straight-edge O, and its pegs, or stops b b, when the plane of the said board is crossed by two systems of 'numbered lines, at right angles to each other, and an inch apart, substantially as and for thepurpose shown and described.

The above specification of my invention signed by me, this 2d day of October, 1868. Y

FRANKLIN BOWLY. Witnesses:

L. P. HARTMAN,

.\R1cHARDsoN. 

